demux_mov.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

	    skipped += 4;
	  }
#endif	  
	  } break;
	case MOV_FOURCC('m','o','o','v'):
//	case MOV_FOURCC('c','m','o','v'):
	  mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie header found!\n");
	  priv->moov_start=(off_t)stream_tell(demuxer->stream);
	  priv->moov_end=(off_t)priv->moov_start+len-skipped;
	  mp_msg(MSGT_DEMUX,MSGL_DBG2,"MOV: Movie header: start: %x end: %x\n",
	    priv->moov_start, priv->moov_end);
	  skipped+=8;
	  i = stream_read_dword(demuxer->stream)-8;
	  if(stream_read_dword(demuxer->stream)==MOV_FOURCC('r','m','r','a')){
	      int ref=0;
	      skipped+=i;
	      mp_msg(MSGT_DEMUX,MSGL_INFO,"MOV: Reference Media file!!!\n");
	      //set demuxer type to playlist ...
	      demuxer->type=DEMUXER_TYPE_PLAYLIST;
	      while(i>0){
	          int len=stream_read_dword(demuxer->stream)-8;
		  int fcc=stream_read_dword(demuxer->stream);
		  if(len<0) break; // EOF!?
		  i-=8;
//		  printf("i=%d  len=%d\n",i,len);
		  switch(fcc){
		  case MOV_FOURCC('r','m','d','a'):
		      continue;
		  case MOV_FOURCC('r','d','r','f'): {
		      int tmp=stream_read_dword(demuxer->stream);
		      int type=stream_read_dword_le(demuxer->stream);
	              int slen=stream_read_dword(demuxer->stream);
		      //char* s=malloc(slen+1);
		      //stream_read(demuxer->stream,s,slen);
		      
		      //FIXME: also store type & data_rate ?
		      ds_read_packet(demuxer->video, 
			demuxer->stream,
			slen,
			0,
			stream_tell(demuxer->stream),
			0 // no flags 
		      );
		      flags|=4;
		      mp_msg(MSGT_DEMUX,MSGL_V,"Added reference to playlist\n");
		      //s[slen]=0;
		      //mp_msg(MSGT_DEMUX,MSGL_INFO,"REF: [%.4s] %s\n",&type,s);
		      len-=12+slen;i-=12+slen; break;
		    }
		  case MOV_FOURCC('r','m','d','r'): {
		      int flags=stream_read_dword(demuxer->stream);
		      int rate=stream_read_dword(demuxer->stream);
		      mp_msg(MSGT_DEMUX,MSGL_V,"  min. data rate: %d bits/sec\n",rate);
		      len-=8; i-=8; break;
		    }
		  case MOV_FOURCC('r','m','q','u'): {
		      int q=stream_read_dword(demuxer->stream);
		      mp_msg(MSGT_DEMUX,MSGL_V,"  quality index: %d\n",q);
		      len-=4; i-=4; break;
		    }
		  }
		  i-=len;stream_skip(demuxer->stream,len);
	      }
	  }
	  flags|=1;
	  break;
	case MOV_FOURCC('w','i','d','e'):
	  mp_msg(MSGT_DEMUX,MSGL_V,"MOV: 'WIDE' chunk found!\n");
	  if(flags&2) break;
	case MOV_FOURCC('m','d','a','t'):
	  mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie DATA found!\n");
	  priv->mdat_start=stream_tell(demuxer->stream);
	  priv->mdat_end=priv->mdat_start+len-skipped;
	  mp_msg(MSGT_DEMUX,MSGL_DBG2,"MOV: Movie data: start: %x end: %x\n",
	    priv->mdat_start, priv->mdat_end);
	  flags|=2;
	  if(flags==3){
	    // if we're over the headers, then we can stop parsing here!
	    demuxer->priv=priv;
	    return 1;
	  }
	  break;
	case MOV_FOURCC('f','r','e','e'):
	case MOV_FOURCC('s','k','i','p'):
	case MOV_FOURCC('j','u','n','k'):
	  mp_msg(MSGT_DEMUX,MSGL_DBG2,"MOV: free space (len: %d)\n", len);
	  /* unused, if you edit a mov, you can use space provided by free atoms (redefining it) */
	  break;
	case MOV_FOURCC('p','n','o','t'):
	case MOV_FOURCC('P','I','C','T'):
	  /* dunno what, but we shoudl ignore it */
	  break;
	default:
	  if(no==0){ free(priv); return 0;} // first chunk is bad!
	  id = be2me_32(id);
	  mp_msg(MSGT_DEMUX,MSGL_V,"MOV: unknown chunk: %.4s %d\n",&id,(int)len);
	}
skip_chunk:
	if(!stream_skip(demuxer->stream,len-skipped)) break;
	++no;
    }

    if(flags==3){
	demuxer->priv=priv;
	return 1;
    }
    free(priv);

    if ((flags==5) || (flags==7)) // reference & header sent
        return 1;

    if(flags==1)
	mp_msg(MSGT_DEMUX,MSGL_WARN,"MOV: missing data (mdat) chunk! Maybe broken file...\n");
    else if(flags==2)
	mp_msg(MSGT_DEMUX,MSGL_WARN,"MOV: missing header (moov/cmov) chunk! Maybe broken file...\n");

    return 0;
}

static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak){
    mov_priv_t* priv=demuxer->priv;
//    printf("lschunks (level=%d,endpos=%x)\n", level, endpos);
    while(1){
	off_t pos;
	off_t len;
	unsigned int id;
	//
	pos=stream_tell(demuxer->stream);
//	printf("stream_tell==%d\n",pos);
	if(pos>=endpos) return; // END
	len=stream_read_dword(demuxer->stream);
//	printf("len==%d\n",len);
	if(len<8) return; // error
	len-=8;
	id=stream_read_dword(demuxer->stream);
	//
	mp_msg(MSGT_DEMUX,MSGL_DBG2,"lschunks %.4s  %d\n",&id,(int)len);
	//
	if(trak){
	  switch(id){
	    case MOV_FOURCC('m','d','a','t'): {
		mp_msg(MSGT_DEMUX,MSGL_WARN,"Hmm, strange MOV, parsing mdat in lschunks?\n");
		return;
	    }
	    case MOV_FOURCC('f','r','e','e'):
	    case MOV_FOURCC('u','d','t','a'):
		/* here not supported :p */
		break;
	    case MOV_FOURCC('t','k','h','d'): {
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sTrack header!\n",level,"");
		// read codec data
		trak->tkdata_len=len;
		trak->tkdata=malloc(trak->tkdata_len);
		stream_read(demuxer->stream,trak->tkdata,trak->tkdata_len);
/*
0  1 Version
1  3 Flags
4  4 Creation time
8  4 Modification time
12 4 Track ID
16 4 Reserved
20 4 Duration
24 8 Reserved
32 2 Layer
34 2 Alternate group
36 2 Volume
38 2 Reserved
40 36 Matrix structure
76 4 Track width
80 4 Track height
*/
		mp_msg(MSGT_DEMUX,MSGL_V,"tkhd len=%d ver=%d flags=0x%X id=%d dur=%d lay=%d vol=%d\n",
		    trak->tkdata_len, trak->tkdata[0], trak->tkdata[1],
		    char2int(trak->tkdata,12), // id
		    char2int(trak->tkdata,20), // duration
		    char2short(trak->tkdata,32), // layer
		    char2short(trak->tkdata,36)); // volume
		break;
	    }
	    case MOV_FOURCC('m','d','h','d'): {
		unsigned int tmp;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sMedia header!\n",level,"");
#if 0
		tmp=stream_read_dword(demuxer->stream);
		printf("dword1: 0x%08X (%d)\n",tmp,tmp);
		tmp=stream_read_dword(demuxer->stream);
		printf("dword2: 0x%08X (%d)\n",tmp,tmp);
		tmp=stream_read_dword(demuxer->stream);
		printf("dword3: 0x%08X (%d)\n",tmp,tmp);
		tmp=stream_read_dword(demuxer->stream);
		printf("dword4: 0x%08X (%d)\n",tmp,tmp);
		tmp=stream_read_dword(demuxer->stream);
		printf("dword5: 0x%08X (%d)\n",tmp,tmp);
		tmp=stream_read_dword(demuxer->stream);
		printf("dword6: 0x%08X (%d)\n",tmp,tmp);
#endif
		stream_skip(demuxer->stream,12);
		// read timescale
		trak->timescale=stream_read_dword(demuxer->stream);
		// read length
		trak->length=stream_read_dword(demuxer->stream);
		break;
	    }
	    case MOV_FOURCC('h','d','l','r'): {
		unsigned int tmp=stream_read_dword(demuxer->stream);
		unsigned int type=stream_read_dword_le(demuxer->stream);
		unsigned int subtype=stream_read_dword_le(demuxer->stream);
		unsigned int manufact=stream_read_dword_le(demuxer->stream);
		unsigned int comp_flags=stream_read_dword(demuxer->stream);
		unsigned int comp_mask=stream_read_dword(demuxer->stream);
		int len=stream_read_char(demuxer->stream);
		char* str=malloc(len+1);
		stream_read(demuxer->stream,str,len);
		str[len]=0;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sHandler header: %.4s/%.4s (%.4s) %s\n",level,"",&type,&subtype,&manufact,str);
		free(str);
		switch(bswap_32(type)){
		case MOV_FOURCC('m','h','l','r'):
		    trak->media_handler=bswap_32(subtype); break;
		case MOV_FOURCC('d','h','l','r'):
		    trak->data_handler=bswap_32(subtype); break;
		default:
		    mp_msg(MSGT_DEMUX,MSGL_V,"MOV: unknown handler class: 0x%X (%.4s)\n",bswap_32(type),&type);
		}
		break;
	    }
	    case MOV_FOURCC('v','m','h','d'): {
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sVideo header!\n",level,"");
		trak->type=MOV_TRAK_VIDEO;
		// read video data
		break;
	    }
	    case MOV_FOURCC('s','m','h','d'): {
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSound header!\n",level,"");
		trak->type=MOV_TRAK_AUDIO;
		// read audio data
		break;
	    }
	    case MOV_FOURCC('g','m','h','d'): {
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sGeneric header!\n",level,"");
		trak->type=MOV_TRAK_GENERIC;
		break;
	    }
	    case MOV_FOURCC('n','m','h','d'): {
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sGeneric header!\n",level,"");
		trak->type=MOV_TRAK_GENERIC;
		break;
	    }
	    case MOV_FOURCC('s','t','s','d'): {
		int i=stream_read_dword(demuxer->stream); // temp!
		int count=stream_read_dword(demuxer->stream);
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sDescription list! (cnt:%d)\n",level,"",count);
		for(i=0;i<count;i++){
		    off_t pos=stream_tell(demuxer->stream);
		    off_t len=stream_read_dword(demuxer->stream);
		    unsigned int fourcc=stream_read_dword_le(demuxer->stream);
		    /* some files created with Broadcast 2000 (e.g. ilacetest.mov)
		       contain raw I420 video but have a yv12 fourcc */
		    if(fourcc==mmioFOURCC('y','v','1','2')) fourcc=mmioFOURCC('I','4','2','0');
		    if(len<8) break; // error
		    mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*s desc #%d: %.4s  (%d bytes)\n",level,"",i,&fourcc,len-16);
		    if(fourcc!=trak->fourcc && i)
			mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_MOVvariableFourCC);
//		    if(!i)
		    {
			trak->fourcc=fourcc;
			// read type specific (audio/video/time/text etc) header
			// NOTE: trak type is not yet known at this point :(((
			trak->stdata_len=len-8;
			trak->stdata=malloc(trak->stdata_len);
			stream_read(demuxer->stream,trak->stdata,trak->stdata_len);
		    }
		    if(!stream_seek(demuxer->stream,pos+len)) break;
		}
		break;
	    }
	    case MOV_FOURCC('s','t','t','s'): {
		int temp=stream_read_dword(demuxer->stream);
		int len=stream_read_dword(demuxer->stream);
		int i;
		unsigned int pts=0;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample duration table! (%d blocks)\n",level,"",len);
		trak->durmap=malloc(sizeof(mov_durmap_t)*len);
		memset(trak->durmap,0,sizeof(mov_durmap_t)*len);
		trak->durmap_size=len;
		for(i=0;i<len;i++){
		    trak->durmap[i].num=stream_read_dword(demuxer->stream);
		    trak->durmap[i].dur=stream_read_dword(demuxer->stream);
		    pts+=trak->durmap[i].num*trak->durmap[i].dur;
		}
		if(trak->length!=pts) mp_msg(MSGT_DEMUX, MSGL_WARN, "Warning! pts=%d  length=%d\n",pts,trak->length);
		break;
	    }
	    case MOV_FOURCC('s','t','s','c'): {
		int temp=stream_read_dword(demuxer->stream);
		int len=stream_read_dword(demuxer->stream);
		int ver = (temp << 24);
		int flags = (temp << 16)|(temp<<8)|temp;
		int i;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample->Chunk mapping table!  (%d blocks) (ver:%d,flags:%ld)\n",
		    level,"",len,ver,flags);
		// read data:
		trak->chunkmap_size=len;
		trak->chunkmap=malloc(sizeof(mov_chunkmap_t)*len);
		for(i=0;i<len;i++){
		    trak->chunkmap[i].first=stream_read_dword(demuxer->stream)-1;
		    trak->chunkmap[i].spc=stream_read_dword(demuxer->stream);
		    trak->chunkmap[i].sdid=stream_read_dword(demuxer->stream);
		}
		break;
	    }
	    case MOV_FOURCC('s','t','s','z'): {
		int temp=stream_read_dword(demuxer->stream);
		int ss=stream_read_dword(demuxer->stream);
		int ver = (temp << 24);
		int flags = (temp << 16)|(temp<<8)|temp;
		int entries=stream_read_dword(demuxer->stream);
		int i;
		
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample size table! (entries=%d ss=%d) (ver:%d,flags:%ld)\n",
		    level,"",entries,ss,ver,flags);
		trak->samplesize=ss;
		if (!ss) {
		  // variable samplesize
		  trak->samples=realloc(trak->samples,sizeof(mov_sample_t)*entries);
		  trak->samples_size=entries;
		  for(i=0;i<entries;i++)
		    trak->samples[i].size=stream_read_dword(demuxer->stream);
		}
		break;
	    }
	    case MOV_FOURCC('s','t','c','o'): {
		int temp=stream_read_dword(demuxer->stream);
		int len=stream_read_dword(demuxer->stream);
		int i;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sChunk offset table! (%d chunks)\n",level,"",len);
		// extend array if needed:
		if(len>trak->chunks_size){
		    trak->chunks=realloc(trak->chunks,sizeof(mov_chunk_t)*len);
		    trak->chunks_size=len;
		}
		// read elements:
		for(i=0;i<len;i++) trak->chunks[i].pos=stream_read_dword(demuxer->stream);
		break;
	    }
	    case MOV_FOURCC('c','o','6','4'): {
		int temp=stream_read_dword(demuxer->stream);
		int len=stream_read_dword(demuxer->stream);
		int i;
		mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*s64bit chunk offset table! (%d chunks)\n",level,"",len);
		// extend array if needed:
		if(len>trak->chunks_size){
		    trak->chunks=realloc(trak->chunks,sizeof(mov_chunk_t)*len);
		    trak->chunks_size=len;
		}
		// read elements:
		for(i=0;i<len;i++)
		{
#ifndef	_LARGEFILE_SOURCE
		    if (stream_read_dword(demuxer->stream) != 0)
			mp_msg(MSGT_DEMUX, MSGL_WARN, "Chunk %d has got 64bit address, but you've MPlayer compiled without LARGEFILE support!\n", i);
		    trak->chunks[i].pos = stream_read_dword(demuxer->stream);
#else
		    trak->chunks[i].pos = stream_read_qword(demuxer->stream);
#endif
		}
		break;
	    }
	    case MOV_FOURCC('s','t','s','s'): {
		int temp=stream_read_dword(demuxer->stream);
		int entries=stream_read_dword(demuxer->stream);
		int ver = (temp << 24);
		int flags = (temp << 16)|(temp<<8)|temp;
		int i;
		mp_msg(MSGT_DEMUX, MSGL_V,"MOV: %*sSyncing samples (keyframes) table! (%d entries) (ver:%d,flags:%ld)\n",
		    level, "",entries, ver, flags);
		trak->keyframes_size=entries;